The dependence of the Richtmyer-Meshkov instability on the atwood number and dimensionality - Theory and experiments

O. Sadot, A. Yosef-Hai, Dan Oron, A. Rikanati, D. Kartoon, L. Arazi, Y. Elbaz, E. Sarid, G. Ben-Dor, D. Shvarts

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to verify the predictions of the 2D high Atwood number potential flow model for the evolution of the shock wave induced Richtmyer-Meshkov instability,1 shock-tube experiments were performed with a single-mode perturbation and two competing bubbles as the initial conditions.2 The experimental results were compared to theoretical model and to numerical simulation. In the present work the dependence of the instability on the Atwood number and the dimensionality of the instability were investigated in a shock tube apparatus. A high speed schlieren photography system were used to monitor the evolution of the unstable contact surface. Different Atwood numbers were achieved by using different gases. The results of those experiments were found to be in very good agreement with the predictions of theoretical model and numerical simulation. These results verify the key elements of the Atwood number scaling of the bubble-merger model used for the prediction of the multi-mode bubble an d spike front evolution at all Atwood numbers. The dimensionality investigation of the instability evolution was done using a pyramid like initial perturbation. The results reveal the same two key elements of the bubble-merger model to describe the bubble and spike front evolution as in the 2D case2 except for different scaling constants.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages798-806
Number of pages9
Volume4183
DOIs
Publication statusPublished - 2001
Event24th International Congress on High-Speed Photography and Photonics - Sendai, Japan
Duration: Sep 24 2000Sep 29 2000

Other

Other24th International Congress on High-Speed Photography and Photonics
CountryJapan
CitySendai
Period9/24/009/29/00

Keywords

  • High speed photography
  • Hydrodynamic instability
  • Richtmyer-Meshkov instability
  • Schlieren photography

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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    Sadot, O., Yosef-Hai, A., Oron, D., Rikanati, A., Kartoon, D., Arazi, L., Elbaz, Y., Sarid, E., Ben-Dor, G., & Shvarts, D. (2001). The dependence of the Richtmyer-Meshkov instability on the atwood number and dimensionality - Theory and experiments. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4183, pp. 798-806) https://doi.org/10.1117/12.424357